package com.hmdp.utils;

import cn.hutool.core.lang.UUID;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.multipart.support.StandardMultipartHttpServletRequest;

import java.util.concurrent.TimeUnit;

import static java.lang.Boolean.TRUE;

public class SimpleRedisLocak implements ILock{
    private String name;
    private StringRedisTemplate stringRedisTemplate;
    public SimpleRedisLocak(String name,StringRedisTemplate stringRedisTemplate){
this.name=name;
this.stringRedisTemplate=stringRedisTemplate;
    }
    private  static final String KEY_PREFIX="lock";
    private static final String ID_PREFIX= UUID.randomUUID().toString(true)+"-";
    @Override
    public boolean tryLock(long timeoutSec) {
        //获取线程的标识
        String threadId=ID_PREFIX+Thread.currentThread().getId();
        //获取锁
        Boolean success=stringRedisTemplate.opsForValue()
                .setIfAbsent(KEY_PREFIX+name,threadId,timeoutSec, TimeUnit.SECONDS);
        return Boolean.TRUE.equals(success);

    }

    @Override
    public void unlock() {
        //获取线程锁
        String threadId=ID_PREFIX+ Thread.currentThread().getId();
        //获取锁中的标识
       String id=stringRedisTemplate.opsForValue().get(KEY_PREFIX+name);
// 判断锁中的标识是否一致
        if(threadId.equals(id)){
            // 释放锁
            stringRedisTemplate.delete(KEY_PREFIX+name);

        }

    }
}
